Cosmological Implications of Two Conflicting Deuterium Abundances
| dc.creator | Hata, N. | |
| dc.creator | Steigman, G. | |
| dc.creator | Bludman, S. | |
| dc.creator | Langacker, P. | |
| dc.date | 1996-03-17 | |
| dc.date.accessioned | 2026-07-07T10:31:42Z | |
| dc.date.available | 2026-07-07T10:31:42Z | |
| dc.description | Constraints on big bang nucleosynthesis (BBN) and on cosmological parameters from conflicting deuterium observations in different high red-shift QSO systems are discussed. The high deuterium observations by Carswell et al., Songaila et al., and Rugers & Hogan is consistent with 4He and 7Li observations and Standard BBN (N_nu =3) and allows N_nu \leq 3.6 at 95% C.L., but is inconsistent with local observations of D and 3He in the context of conventional theories of stellar and Galactic evolution. In contrast, the low deuterium observations by Tytler, Fan & Burles and Burles & Tytler are consistent with the constraints from local Galactic observations, but require N_nu = 1.9 +/- 0.3 at 68% C.L., excluding Standard BBN at 99.9% C.L., unless the systematic uncertainties in the 4He observations have been underestimated by a large amount. The high and low primordial deuterium abundances imply, respectively, Omega_B h^2 = 0.005 - 0.01 and Omega_B h^2 = 0.02 - 0.03 at 95% C.L. When combined with the high baryon fraction inferred from x-ray observations of rich clusters, the corresponding total mass densities (for 50 \le H_0 \le 90) are Omega_M = 0.05 - 0.20 and Omega_M = 0.2 - 0.7, respectively (95\% C.L.) The range of Omega_M corresponding to high D is in conflict with dynamical constraints (Omega_M > 0.2 - 0.3) and with the shape parameter constraint (Gamma = Omega_M h = 0.25 +/- 0.05) from large scale structure formation in CDM and Lambda-CDM models. | |
| dc.description | 29p including 12 postscript figures, uses REVTEX 3.0 and epsf.sty, entire ps file with embedded figures available at ftp://upenn5.hep.upenn.edu/pub/hata/papers/Dqso.ps.gz | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9603087 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9603087 | |
| dc.identifier | Phys.Rev.D55:540-547,1997 | |
| dc.identifier | doi:10.1103/PhysRevD.55.540 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178504 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Cosmological Implications of Two Conflicting Deuterium Abundances | |
| dc.type | text |